System for controlling the operation of electric motors.



No. 878,855. PATENTED FEB. lli 1908,

T. E'. BARNM. SYSTEM FOR GONTROLLNG THB OPERATGN 0F ELETRIG MUTORS. APPLNATION FILED JULY 1o, 1905` v Unwnlo:

Ear?? am THOMAS E. BARNUH, OF VIILYYUlEE, 'WISCONSIN ASSIGNOR TO THE CUTLERIAMMER MFG. CO., Ol" MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN.

YSTEM FORQCONTBLLING PERTION OF ELECTR'CC INSIGTORS.

No. 878,855. r

Specification of Letters Estant.

Application filed Juif,Y l0. 1905. Serial llo. 268.974.

To all'l v2li/om 'it may concern.

Be it known tlnn l, rlnoniis E. lAnNUM, a eitizen ol' the United Sintes, residing at iviilwinihee, in the county ol lliiwnuliee :ind

Slate oi' Vl'iseonsin, have invented new sind usel'ul Improvements in Systems lor tontrolling' the Operation ol' Electric lllotors, oi' which the following is n. full, elem', concise, :ind exact description, reference being had to tl accompnnving;- drawing, forming` ny port of this speeiliention'.

My invention relnles to improvements in systems l'or controlling the operation oi' eleotric iiiotoi's.

'l`he object olf my invention is to provide n system liv menus oi' which the operation of the motor muy lie controlled l'rom n distant point.

'llhe other olijeeis ol' my invenlion will he nnderstoml from lhe description ol' lhesystem which is eontnined herein.

For the purpose oll illustratingmy invention, llnifve designed the system which is illuslrnled in the nreompnnying drawing', in which,

Figure l shows :i dincinm olA in v syste i, :1ndV Fir. 2 illustraften n. vnlve.

Although l prel'ernl l \r employ my system l'or the purpose ol' opernting;` vulves, it will he purposes.

The vnlve l, which is illusirnted in VFig'. 2 ol' the drawing, is connected or geared to n motor 2. 'lhis vnlve is p1 l'erzihl) attached lo n screw il, which is lhrended into :i geni 'l, 'lhis geni' l mrs upon n slnndzn'd 5 :ind

meshes with :i pinion (l, which is mounted upon :i couniei'shnl'l'` T. llhe motor 2 is geared lo the eounierslnil;y li means of 40 shnl't nnd meshes with n pinion El mounted up'on lthe eounlerslnilt. 'Vlie vulve nnijf he opened ln running the motor in one direction,` und closed h v running said motor in the opposite direeiiini. (li course, the valve l may lie ol' :in v type und it may he geared or connected io the motor in various ways, so fair :is my invention is concerned.

l shall now describe my system for controlling the opera-tion of the motor 2, reference. being' had pnrticulnrly to Fig. 1. The motor is provided with :in armature 2L and a lield 2b. (lf course, it may lio-of various forms.

l preieriihly provide a reversing switch lR for controlling the motor circuit, it preferunderstood lnit il may he applied lo other' freni' N which is mounted upon the counter-- ably boing provided with plungers l() and' 1 1, which are. adapted to he rinsed by electromagnetic windings or sole-n nids 12 and 123 rcil it is desired to close the valve. Y

To open the motor circuit after the motor has heen started, l preiferhly employ an which preferably proeetro magnetic windings 20, 21 the win-dings 22 nn d 21 boing;1 wound io oppose the winding 2t). The winding 2O 'prei'crnbly nr ringed in cire-uit in serios wit thc armature of the motor, and the windings 2i and are preferably -nrrmiged in the short circuit-s around the, resistnnces 15 'l'nd in respectively, so that the circuits of the i snnie will he, contolled hv controlling switches 17 eind 1S. preferably arrange with the controlling switches 17` and 18 ay switch 23, by means ol w lich the reversing switch may he opened whenever it is desired to stop the motor while the valve 1 is in an intermediate position. l

l shall now describe the operation of my system.

il2 the niziin switch S .he closed, current will flow l'roin the positive main 24, through conductor 25, thence. dividingly through rcsistnnces 15 und 16 and windings 12 and 13, :ind linnlly through overload switch 1Q and conductor 26 to thc negative. inainc 27. the resistanccs l 5 `and 1G will not permit sul!- lieicnt Current to poss therethrough to energize the, windings 1.2 and 13, the reversing switch will renniin open. lf now the controlling' switch 17 he closed to short circuit the resistance 16, fr circuit will lic established from the positive main 24 through the conductor.

overload switch 19, vide with el inni 27 spectiveljr.- The plungers rv switch contacts, und the are. prefere-bly interlocked so 'that it lll impossible for both 25 switch 23 controllin 'switch 17 Windin` Cgi 22, 'vviiniing 13, overload switch 19 and conductor 26 to the negative main 27. The winding 13 will then raise the plunger 11, 'thereby causing the. motor circuitto be closed from the positive main 24; through the conductor 2S, overload magnet 20, -switch contact conductor 30, field 2h, conductor Si, switch contact 22, conductor 33, armature 2, conductor Si, switch contact 35 and conductor 36 to the negative main 27. lnasmuch the winding 22 opposes 'the overload magnet 20, it will prevent said overload magnet from responding to the heavy current which Vflows through the same during the period oi starting the motor.l After the motor has passed through the starting, period; the switch 17 may be opened, it being' no longer necessary to have the winding 22 opposed to overload magnet 20, as the current flowing through said overload magnet will then be reduced by the counter electro motive torce, ot the motor. The inotor having been started, it will cause. the valve to be raised. As soon as the valve has been opened, tire motor will be stalled and in consequence the current in the motor circuit will increase to such an extent that the overloadniagnet will respond, thereby causingr the overload switch 1) to open the circuit ot' winding l?. Y open the motor circuit. If now the controliing sivi't :h lo he closed, the vresistance 15 "vviii be short circuited, and current vvill ilon' from tue positive main 24 through conductor 25, switch 223, controlling switch li, winding` El, conductor 337, winding l2, overload switch i9 and conductor to the negative main 27. The Winding 12 will then raise thc plunger 1i() to cause the reversing switch to close the motor circuit .rom the positive. main 2l. through conductor 28, overload magnet El), switch contact '38, conductor El), field 2b, conductor 31, switch contact 8), armature E, switch'contact 40, and conductor 3G to the negative main 27. With the, motor circuits closed in this manner,l the motor will lower the vave l, While Ythe switch 1S remains closed7 the winding?r 21 will oppose the overload magnet and accredii'igjly it will ircvent the overload switch beiner opened during the period oi starting the motor. As soon as the valve has heen closed, the motor will be stalled. As the overload magnet 'will then respond, the overload switch will'open the circuit ot' winding I2, and thus cause the reversing switch to open, the motor circuit.. if it is desired to stop the motor at anytime While the valve is in an intermediate position, the svvitch Z3 may be opened,v thereby causing either the winding' l2 oi' the winding-i3 to he denergized so that the reversing switches will open the motor circuit. c

will he understood that various changes may he made in the system which. I have The reversing switch will then illustrated and described herein without in any Way departing from my invention.

I'Iaving thus described my invention what I claim and desire to secure by Letters Iatent is: v

l. In a system for contro-lling the operation of electric motors, in combination, a motor, electro magnetic means for closing the motor circuit to start the motor, an electro "responsive overload device for opcniinjr the motor circuit to stop the motor, and means temporarily in operative relation with said overload device for preventing the same from responding during the period of starting the motor.

2. In a system for controlling the operation of electric motors, in combination, a motor, means for closing the motor circuit to start the motor, means for stalling the motor after the same operates for a prearranged period, an electro responsive device for opening the motor circuit aitcr the motor becomes stalled, and means for preventing' said overload device fronrrespondingr during' the period of starting` the motor.

3. In a system for controlling' the operation of electric motors, in combination, a motor, a magnetically operated switch for closing the motor circuit to start the motor, means for controlling' thc operation ot said switch from a distant point, in 2ans adapted to stall said motor after it operates tor a prearranged period, an electro responsive overload device adapted toopenthemotor circuit, and mea-ns for preventing' said device from responding during the period ot starting the motor.

4. In a system 'for controlling' the operation of electric motors, in combination, a motor, a. magnetically operated reversing switch for closing;l the motor circuit to start t'ne motor, means for controllingr the opera tion of said switch from a distant point, means adapted to stall said motor atteihit operates for a prcan'anged period, an electro responsive device adapted to open the motor circuit, and means tor .preventing saiddevice from responding during the. period oi' starting the motor.

5.v In a system for controlling-the operation of electric motors, in combination, a motor, electro magnetic means for closing the nietor circuit to start the. motor, an electro responsive overload, device for opening the motor circuit, an electro vmagnetic winding adapted to prevent said device from re sponding during,l the period of startingr the motor.

6. in a system for controlling the operation `il electric motors, in combination, a motor, electro magnetic moans for closing` the motor circuit to start the motor, an overload electro magnet, means adapted to he operated by said magnet to open the motor circuit, a Winding adapted to oppose said magnet, and

ifil) magnet to .prevent said Cri means for closing the circuit of said winding to prevent said overload n'iagnet from re spending daring the period of starting the motor.

7. In a system for controlling the operation of electric motors, in combination, a motor, a motor switch for closing the motor circuit to start the motor, an overload magnet, means adapted to be operated by said magnet to open the motor circuit, a controlling switch for controlling the operation of said motor switch, and an electro magnetic winding adapted to oppose said overload magnet from responding during the period of starting the motor, said winding being arranged in circuit to have the circuit thereof controlled by said controlling switch.

F5. inf a system for controlling the operation of' electric motors, in combination, a motor, a magnetically operated switch for closing thc motor circuit during the period of starting the motor, means for controlling the operation of said switch from a distant point, an overload magnet, means adapted to be operated by said magnet to open the motor circuit, and an electro magnetic wind- .ing adapted to oppose said overload magnet during the period of starting the motor to prevent said magnet 'from responding.

9. .ln a system for controlling the operation of electric motors, in combination, a motor, a magnetically operated motor switch for closing the motor circuit to start the motor, a controlling switch arranged at a distant point for controlling the operation of said motor switch, an overload magnet, means adapted to be operated by said overload magnet to open the motor circuit, and an electro magnetic winding adapted to oppose said overload magnet during the period of starting the motor.

10. in a svstcin for controlling the operation of electric motors, a motor, a motor switch, an electro magnetic winding adapted to operate said switch to close the motor circuit, a resista-nce arranged in circuit in series with said winding, a switch adapted to short circuit said resistancal an overload magnet arranged in circuit in series with* the armature of said motor, means adapted to be operated by said overload magnet to open the motor circuit, and an electro magnetic winding arranged to oppose said overload n'iagnct and adapted to have thc circuit. thereof closed by said controlling switch during the period ol' starting thil motor.

il. in a system for controlling the operation of electric motors, in combination, a motor, a motor switch, an electro magnetic winding adapted to operate said switch to close the motor circuit, a resistance arranged in circuit in series with said winding, a controlling switch ada ted to short circuit said resistance, an over oad magnet arranged in vspond circuit in series with the armature of said motor, an overload switch adapted to be operated by said overload magnet to open the circuit of said winding for operating said motor switch, and an electro magnetic winding adapted to oppose said overload magnet and arranged in circuit to have the circuit thereof closed by said controlling switch dur ing the period of starting said motor.

l2. ln a system :for controlling the operation of electric motors, in combination, a motor, a reversing switch for said motor, electro magnetic windings for operating said switch, switches for controlling the operation of said reversing switch, an overload electro magnet arranged in circuit in series vith the armature of said motor, means adapted to be operated by said overload magnet to open the motor circuit, and electro magnetic windings adapted to oppose said overload magnet during the period of starting the motor.

13. In a system for operating valves, in combination, a valve, a motormlapted to operate said valve, means for closinr the motor circuit to start the motor, an e ectro responsive overload device adapted to rewhenever the motor becomesstalled by opening or closing the Valve, and moans for i'neventing said device from responding during the period ofstarting the motor.

14. In a system for operating valves, in combination, a valve, a motor adapted to operate said valve, ainagnetically operated motor switch adapted to close the motor circuit to start the motor, means adaptedto control the operation of said motor switch, an overload magnet arranged in circuit in series with the armature of said motor, means adapted to be. oierated by said overload magnet to open the motor circuit whenever the motor becomes stalled by opening or closing said valve, and an electro magnetic winding adapted to o )pose said overloadmagnet during the period of starting the motor.

15. in a system for operating valves, in combination, a valve, a motor adapted to operate the same, a magnetically operated reversing switch adapted to close theI motor circuit to start the motor, means for controlling the operation of said re vcrsing switch, an overload electro magnet, means adapted to be operated by said overload magnet to open the motor circuit whenever the motor becomes stalled by opening or closing said valve, and lmeans for preventing said overload magnet from responding during the period of starting the motor.

1,6. ln a system for operating valves, in combination, a valve, a motor adapted to operate said valve, a reversing switch, electro magnetic windings for operating said switch, switches for controlling the operation of said reversin switch, an overload electro magnet arrange in circuit in series with the armature of said motor, means adapted lo be o 'eratod bv said overload magnet to open E in the cnrciiit of said winding, an overload t e motor circuit whenever the motor becomes stalled b v opening or closing said valve,

and electro magnetic windings adaptedlo opposesaidoverload electro mag-net during Jflie Aperiod of starting the motor.

17. In a system for operating valves. in combination, a valve, a. motor adapted to operate said valve, a reversing switoli adapted to close the motor circuit to start tbe motor, electro magnetic windings for operating said revcrsinpT switch, resistances arranged in circuit in series with said ances, an overlcaid electro i'nagnet arranged in circuit in series with the armature of said t motor, a switch adapted to be operated by said overload magnet to open the cire-nits of said windings, an electro magnetic Winding arranged in tlie sliort circuits around said resistances and adapted to oppose said overload magnet.

18. in combination, a translating device, an electro-magnetically operated switcli for controllin" -the circuit of. said translating device, y

from a distant point, an overload device for causing the circuit of said. translating devices to be opened when a predetermined Icurrent flows, and means temporarily in operativeA relation with said overload device to prevent the saine 'from responding.

19. ln combination, an electro magneticallpv operated switch, means for controlling said switch, an' overload device, and means .temporarily 'in operative relation with said overload device to prevent tlie same from responding.

20. ln combination, an'electro magnetic'ally operated switcli,ineans bv Wliicli said switch is controlled from a distant point, an overload device, and an electro magnetic Winding by means of' which said device is temporarily prevented from responding.

21.111 combination, an electro magnetically operated switch, an overload device for causing said switch to beopened, and an electro magnetic Winding flor temporarily preventing said overload device from respondinv. 4

22. 1n combination, an electro magnetically operated reversing switcii, an overload device lor causing said switch to be opened when a predetermined current flows, and an electro magnetic windin'y for temporarily preventing said overloa device from re.- sponding. A

23. ln combination, a main switch. an

windings, switches adapted to short circuit said resistmeans 'for controllingI said switchl @gases electro magnetic Winding for operating said main switch, an overload svvitcli' arranged an the the circuit of said electro magnetic Winding, an

overload coil for opening said overload switch when a predetermined current flos's. a coil lor opposing the action of said overloai. coil, and means bv which the circuits or" said ivinn'ling and said opposing coil are controlled.

25. ln combination a main Sivit/sli, an. electro magnetic winding for operatingtiie same, a resistance;arrangedin series with said Twinding, an Aoverload switch arranged in the circuit of said Winding, an overload coil for opening said overload switch, a coil 'icor opposing said overload coil, and. a switch for short circniing said resistance and closing; tbc circuit or said opposing coil.

2G. ln combination, a reversing switch, electro magneticivindings for operating tlie same. an overload switcliP arranged in rlie circuits oi' said windings, an overload -ooil for operating said overload switch, a coil for opposingr the action of said overlfiiad svvitcli and also. the energization of said opposing coi 27. ln combination, a reversing svritcli, electro magnetic windings for operating tb same, an overload switch arranged in circuit of said windings, an overload coil for operating; said overload switch, electro. mag

netic ivindincs ada ted to o ose action or' Vance. and closing the circuit of said oppclsing coils.

ln Witness xvliereoiji have liereiintosnbscribed in v name in tlie presence of two vuitnesscs. i

Lidl

YVitne-sses:

J. il. iiiivirnvs, EDWIN l. il. 'loivm 

